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Suppose we have a compression function c, which takes a bit string s to a compressed string c(s). (a) Show that for any integer N there must be a string s of length N for which length(c(s)) ≥ N; that is, no effective compression is done.
(b) Compress some already compressed files (try compressing with the same utility several times in sequence). What happens to the file size?
(c) Given a compression function c as in (a), give a function c ′ such that for all bit strings s, length(c ′ (s)) ≤ min(length(c(s)), length(s)) + 1; that is, in the worst case, compression with c ′ expands the size by only 1 bit.
What is a packet? What is packet switching?How would you explain the concept of packet switching?What are the advantages and disadvantages of packet switching over circuit switching?
build a graphical representation of a Web-based input for making a hotel reservation
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In an age of virtual worlds where people are spending inordinate amounts. Are we voluntarily gravitating to this world and giving up our real world experiences for virtual ones?
Create the logic circuit which will decode a DTMF-like keypad. Keypad comprises of 16 keys, numbered 0 to 9, *, #, A, B, C, and D. Underneath keypad are four horizontal lines and four vertical lines.
What methods are available for managing threads & how do we use them?
Pick the amount from one of the checks in your checkbook. ($50.24)1) Convert the decimal number into a binary number with three places to the right of the binary point.2) Convert the binary number into a hexadecimal number.
The internet uses a network technology called TCP/IP. The name comes from the protocol stack that includes TCP protocol in the transport layer and IP protocol in the network layer. Sometimes UDP ..
Write a single statement that will print the message "first is " followed by the value of first, and then a space, followed by "second = ", followed by the value of second.
Assume that every program in a system contains 40,000 machine code instructions. To execute an instruction it takes 4 machine cycles. Assume that a computer constantly keeps 150 active processes in execution and each active process needs to be exe..
The BufferReader class's readLine method returns a line from a file as a String. If you need to perform calculations, you will need to convert the String object into a number. You can use a wrapper class to convert.
Acts considered cyberterrorism and / or information warfare can be divided into four separate categories; infrastructure attacks, information attacks, technological facilitation, and promotion.
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